Stupid glitch.. Help? Please??

Right. During hour 12, not sure if it is hour 12, but pretty certain it is, you are Chase and have to take out all the men from the water tower. I did this, and then went back to the main building. Madsen died, and it said "Mission Failed". So I decided to try it again, now that I knew I had to protect Madsen. My save is set to just entering the main building, and all there is is one man to kill.

I was wondering is there is any way to fix this "glitch" WITHOUT deleting my save. I read other topics on this, but the only one I found with help was on about a scene, but my save has no scene.

When you get to 4:28 pm and the mission ahead has Chase shooting from the water tower. Chase then goes into the building to shoot the men inside except there are no men. There is only one guy. Thats the glitch

How to fix it

1. Playstation is turned off
2. With game disc and memory card in place, turn on Playstation
3. Load the game (it should be at 4:28). If its not, more about that later
4. The cutscene with Jack and Tony begins
5. Remove the memory card
6. The following message will appear: "Warning, memory card removed . . . Use save game option to manually save progress & re-enable autosave?"
7. Press X for 'OK'
8. Re-insert memory card
9. Watch the cut scene
10. "Previously on 24" dialog box appears. Press X
11. Play the game as usual. If done properly, many men will enter the building during gameplay
12. Save when you have completed the mission.

If your memory card is at 4:41 . . .
Go to 'restart mission' and do a save during the cutscene. You will overwrite 4:41, and be back at 4:28